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一种滚刀主动旋转的坚硬岩石巷隧道掘进机

  • Release time:2023-09-01
  • Hits:
  • School Sign: 

    第一单位
  • Disigner of the Invention: 

    LIU Songyong,zhuzhencai,杜长龙
  • Type of Patent: 

    国内
  • State of Patent: 

    专利授权
  • Application Number: 

    JP6906827
  • Service Invention or Not: 

    no
  • Application Date: 

    2019-09-12
  • Authorization Date: 

    2021-07-02
  • First Author: 

    jianghongxiang